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- 1. Multiple ChoiceWhich of the following is a chemical change?Iron rustingGlass breakingClothing rippingHair cut
- 2. Multiple Choice
Is this equation balanced?YesNoNot enough information - 3. Multiple ChoiceWhat is the law of conservation of matter?Matter changes when reacted or changed.The mass of all reactants are changed during a physical or chemical change.The mass of the reactants is the same as the mass of the products.The mass of the products is different than the mass of the reactants.
- 4. Multiple ChoiceWhich of the following is evidence of a chemical change?Change in stateNo new substance is formedBubbles formingChange in shape
- 5. Multiple ChoiceWhich of the following is an example of a physical change, and why?Fire burns in fireplace, because a new substance is formed.Clothes are folded, because there is a color change.A mirror is broken, because there is a change in shape/size.cookies are baked, because there is a change in temperature
- 6. Multiple ChoiceThis number is used to represent the number of each atom being represented. What is the name of this number?An ExponentThe CoefficientA MoleculeThe Subscript
- 7. Multiple ChoiceThis appears on the left side of a chemical formula, and represents how many compounds there are. What is the name of this number?A Dangling ParticipleThe SubscriptA Prime NumberThe Coefficient
- 8. Multiple ChoiceHow many hydrogen atoms are in this chemical formula:4 hydrogen atoms1 hydrogen atom2 hydrogen atoms3 hydrogen atoms
- 9. Multiple Choice
The atomic number of oxygen is
8
15.9994
16
O
- 10. Multiple Choice
Identify the elements in this compound.
Carbon, Helium, Oxygen
Chromium, Hydrogen, Oxygen
Calcium, Hydrogen, Oxygen
Carbon, Hydrogen, Oxygen
- 11. Multiple Choice
The number of electrons in a Lithium atom is
3
4
6
7
- 12. Multiple Choice
The opposite phase of melting is
Condensation
Vaporization
Sublimation
Freezing
- 13. Multiple Choice
Electrons are
Positively charged particles
Negatively charged particles
Neutral
- 14. Multiple Choice
If an atom has 3 electrons, how many protons does it have?
1
2
3
4
- 15. Multiple Choice
A group of elements that are shiny, conduct heat and electricity well is called
Metals
Non-metals
Metalloids
- 16. Multiple Choice
What is made up two or more elements that are chemically combined?
Atom
Element
Compound
Mixture
- 17. Multiple Choice
Which of these is a property of metals?
Malleable
Very brittle
Can't conduct electricity
- 18. Multiple Choice
What does the nucleus of an atom contain?
Electrons and neutrons
Protons and neutrons
Electrons and protons
DNA
- 19. Multiple Choice
Which is an example of an heterogenous mixture?
soy sauce
salad
tea
guacamole
- 20. Multiple Choice
Metals are located on what size of the periodic table?
left
right
the stairway
the bottom
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